1jwl

Structure of the Dimeric lac Repressor/Operator O1/ONPF Complex

Method: X-RAY DIFFRACTION Dmax: 132.8 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Lactose Operon Repressor

Escherichia coli

UniProt P03023

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–DNA Homooligomer Protein × 2 DNA 2 PDB declaration: tetrameric(4) Consistent with all polymer counts Chain A; UniProt 1–333 Chain B; UniProt 1–333 Fragment:C-terminal deletion mutant 5'-D(*AP*GP*AP*AP*T*TP*GP*TP*GP*AP*GP*CP*GP*GP*AP*TP*AP*AP*CP*AP*AP*TP*T)-3' × 1 5'-D(*TP*AP*AP*TP*TP*GP*TP*TP*AP*TP*CP*CP*GP*CP*TP*CP*AP*CP*AP*AP*TP*TP*C)-3' × 1 NPF 2-nitrophenyl beta-D-fucopyranoside × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;295 K;ammonium sulfate, PEG400, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K Resolution 4.00 Å R-free 0.261
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 1–333 Fragment:C-terminal deletion mutant NPF 2-nitrophenyl beta-D-fucopyranoside × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;295 K;ammonium sulfate, PEG400, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K Resolution 4.00 Å R-free 0.261

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

21 other PDB entries and 24 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name LACI_ECOLI
Isoform
PDB entities 3
Chains and sequence ranges Author chain A; PDBConstruct 1–333; UniProt 1–333 Author chain B; PDBConstruct 1–333; UniProt 1–333 Author chain C; PDBConstruct 1–333; UniProt 1–333

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 1jwl

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1jwl
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1jwl
Deposition date deposition_date2001-09-04
Structure title titleStructure of the Dimeric lac Repressor/Operator O1/ONPF Complex
Keywords keywordsLac Repressor, Gene Regulation, DNA-Bending, TRANSCRIPTION-DNA COMPLEX; TRANSCRIPTION/DNA
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier38.68
Radius of gyration Rg (electron density) rg_electron37.97
Forward intensity I(0) i0191429000.00
Molecular weight molecular_weight104030.0 kDa
Excluded volume excluded_volume127050 ų
Envelope volume envelope_volume172940 ų
Hydration-shell volume shell_volume40377 ų
Envelope diameter envelope_diameter135.6
Shell Rg shell_rg40.90
Envelope Rg envelope_rg38.03
Shape Rg shape_rg37.94
Total Rg total_rg38.23
Total atoms total_atoms7272
Residues n_residues955
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax132.8
Rg (real space) rg_real39.02
Rg uncertainty (real space) rg_real_error1.40
I(0) (real space) i0_real1.9140e+08
I(0) uncertainty (real space) i0_real_error3.6300e+06
Rg (reciprocal space) rg_reciprocal38.82
I(0) (reciprocal space) i0_reciprocal191400000.0000
Solution quality estimate total_estimate0.8511
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary38.9
Skewness Skewness skewness0.450
Kurtosis Kurtosis kurtosis-0.496
Angular range angular_range— – 0.2050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha13760000.0000
Real-space data points n_real_points42
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.812; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.810; Smooth: 0.813

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

Domain ID domain_idd1jwla1
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.5 — GalR/LacI-like bacterial regulator
Domain ID domain_idd1jwla2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like
Domain ID domain_idd1jwlb1
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.5 — GalR/LacI-like bacterial regulator
Domain ID domain_idd1jwlb2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like
Domain ID domain_idd1jwlc_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like

CATH v4.4 (8 domains)

Domain ID domain_id1jwlA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
Domain ID domain_id1jwlA02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1jwlA03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1jwlB01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
Domain ID domain_id1jwlB02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1jwlB03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1jwlC01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1jwlC02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator

8. Citations (1)

9. Files and Curves (10)